Characteristics of a ridge-transform inside corner intersection and associated mafic-hosted seafloor hydrothermal field (14.0 degrees S, Mid-Atlantic Ridge)

doi:10.1007/s11001-013-9209-1

	Characteristics of a ridge-transform inside corner intersection and associated mafic-hosted seafloor hydrothermal field (14.0 degrees S, Mid-Atlantic Ridge)
	Li, Bing 1,2,3; Yang, Yaomin 2,4; Shi, Xuefa 2; Ye, Jun 2; Gao, Jingjing 2; Zhu, Aimei 2; Shao, Mingjuan 2,5
刊名	MARINE GEOPHYSICAL RESEARCH
	2014-03
卷号	35 期号:1 页码:55-68
关键词	Southern Mid-Atlantic Ridge Inside corner hydrothermal activity Massive sulfide deposit Gabbroic intrusion Oceanic core complex
ISSN号	0025-3235
DOI	10.1007/s11001-013-9209-1
英文摘要	Morphotectonic analysis of the inside corner intersection (14.0 degrees S) between the southern Mid-Atlantic Ridge and the Cardno fracture zone indicate a young rough massif emerging after the termination of a previous oceanic core complex. The massif, which hosts an off-axis hydrothermal field, is characterized by a magmatic inactive volcanic structure, based on geologic mapping and sample studies. Mineralogical analyses show that the prominent hydrothermal deposit was characterized by massive pyrite-marcasite breccias with silica-rich gangue minerals. Geochemical analyses of the sulfide breccias indicate two element groups: the Fe-rich ore mineral group and silica-rich gangue mineral group. Rare earth element distribution patterns showing coexistence of positive Eu anomalies and negative Ce anomalies suggest that sulfides were precipitated from diffused discharge resulted from mixing between seawater and vent fluids. Different from several low temperature hydrothermal systems occurring on other intersection dome-like massifs that are recognized as detachment fault surfaces associated with variably metamorphosed ultramafic rocks, the 14.0 degrees S field, hosted in gabbroic-basaltic substrate, is inferred to be of a high temperature system and likely to be driven by deep high temperature gabbroic intrusions. Additionally, the subsurface fossil detachment fault is also likely to play an important role in focusing hydrothermal fluids.
资助项目	China Ocean Mineral Resources Research and Development Association Research Program[DY125-12-R-01]
WOS关键词	MASSIVE SULFIDE DEPOSIT ; OCEANIC CORE COMPLEXES ; SLOW-SPREADING RIDGES ; RARE-EARTH-ELEMENTS ; LOST-CITY ; DETACHMENT FAULTS ; MIDOCEAN RIDGE ; VENT FIELD ; HEAT ; MEGAMULLIONS
WOS研究方向	Geochemistry & Geophysics ; Oceanography
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000332984900004
内容类型	期刊论文
源URL	[http://ir.fio.com.cn:8080/handle/2SI8HI0U/26840]
专题	自然资源部第一海洋研究所
通讯作者	Yang, Yaomin
作者单位	1.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China 2.State Ocean Adm, Inst Oceanog 1, Qingdao 266061, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.State Ocean Adm, Natl Deep Sea Ctr, Qingdao 266061, Peoples R China 5.China Univ Geosci, Beijing 100083, Peoples R China
推荐引用方式 GB/T 7714	Li, Bing,Yang, Yaomin,Shi, Xuefa,et al. Characteristics of a ridge-transform inside corner intersection and associated mafic-hosted seafloor hydrothermal field (14.0 degrees S, Mid-Atlantic Ridge)[J]. MARINE GEOPHYSICAL RESEARCH,2014,35(1):55-68.
APA	Li, Bing.,Yang, Yaomin.,Shi, Xuefa.,Ye, Jun.,Gao, Jingjing.,...&Shao, Mingjuan.(2014).Characteristics of a ridge-transform inside corner intersection and associated mafic-hosted seafloor hydrothermal field (14.0 degrees S, Mid-Atlantic Ridge).MARINE GEOPHYSICAL RESEARCH,35(1),55-68.
MLA	Li, Bing,et al."Characteristics of a ridge-transform inside corner intersection and associated mafic-hosted seafloor hydrothermal field (14.0 degrees S, Mid-Atlantic Ridge)".MARINE GEOPHYSICAL RESEARCH 35.1(2014):55-68.